Fund Overview

Edward L. O'Dette, Jr., is an Investment Officer at MFS Investment Management®. He manages the money market portfolios of our mutual funds, offshore investment products, and variable annuities.
Ed joined MFS in 1983 and has held various positions at MFS including wire order room clerk and account controller being named portfolio manager in April 2003.
He attended Boston State College.
MFS’ portfolio managers are supported by an investment staff of over 160 professionals utilizing MFS Original Research®, a global, company-oriented, bottom-up process of selecting securities.
Our portfolio managers are supported by our entire team of investment professionals in nine worldwide offices. The team employs a proprietary investment process to build better insights for our clients. The core principles of our approach are integrated research, global collaboration, and active risk management.

Fund Information

MCMXXSYMBOL

$1.00
DAILY NAV AS OF 12/8/16

$330
M
NET ASSETS AS OF 10/31/16

Fund Commencement

12/19/75

Class Inception

12/19/75

Daily and Historical Information

Net Assets
($M)
As of
10/31/16

$330.21

Maximum Sales Charge

--

Net Asset Value (NAV)
As of
12/8/16

$1.00

NAV Change

$
0.00
| 0.0%

Fiscal Year End

AUGUST

Fund Number

10

Gross Expense ratio

0.62
%

Net Expense ratio

0.62
%

Daily NAV is the Net Asset Value per share determined using the amortized cost of portfolio securities rounded to two decimal places and is the price at which fund shares are transacted.

Daily and Historical Information is a report which provides the Daily Liquid Assets (% of Portfolio). Weekly liquid Assets (% of Portfolio), Net Shareholder Flows, Net Asset Value (NAV) and the Net Asset Value (at Market) for each business day during the previous 6 months. Definitions of these terms may be found on the report.

Gross Expense Ratio is the fund's total operating expense ratio from the fund's most recent prospectus.

Net Expense Ratio reflects the reduction of expenses from fee waivers and reimbursements. Elimination of these reductions will result in higher expenses and lower performance.

1The fund files monthly portfolio information with the Securities and Exchange Commission (SEC) on Form N-MFP. The fund files monthly portfolio information on Form N-MFP as of the last business day of the month no later than the fifth business day of the following month. Prior to April 14, 2016, the funds Form N-MFP became publicly available on the SECs website 60 days after the filing date. For filings made after April 14, 2016, the funds filings on Form N-MFP will be immediately available on the SECs website.

*By selecting the link, you will be directed to the corresponding filing on the SEC website.

The portfolio is actively managed, and current holdings may be different.

*YTD Updated Daily as of
12/8/16, subject to revision and not annualized.

Performance data shown represents past performance and is no guarantee of future results. Investment return and principal value fluctuate so your shares, when sold, may be worth more or less than the original cost; current performance may be lower or higher than quoted.

An investment in the portfolio is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Although the portfolio seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the portfolio.

Performance data shown represents past performance and is no guarantee of future results. Investment return and principal value fluctuate so your shares, when sold, may be worth more or less than the original cost; current performance may be lower or higher than quoted.

An investment in the portfolio is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Although the portfolio seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the portfolio.

Important Performance Information

Performance results reflect any applicable expense subsidies and waivers in effect during the periods shown. Without such subsidies and waivers the fund's performance results would be less favorable. All results are historical and assume the reinvestment of dividends and capital gains.

Sales Charges

Class A shares ("A") for MFS U.S. Government Cash Reserve Fund and MFS U.S. Government Money Market Fund may be purchased and redeemed at net asset value and have no initial sales charge.

Important Risk Considerations

You could lose money by investing in the Fund. Although the Fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so. An investment in the Fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. The Fund's sponsor has no legal obligation to provide financial support to the Fund, and you should not expect that the sponsor will provide financial support to the Fund at any time. A major increase in interest rates or a decline in the credit quality of an issuer or entity providing credit support, an inactive trading market for money market instruments, or adverse market, economic, political, regulatory, geopolitical, or other conditions could cause the fund's share price to decrease to below $1.00.

The fund's performance could be more volatile than the performance of more diversified funds.

See the results of our collaborative approach for MFS “All Star” portfolios

10/30/15

This publication is authorized for distribution only when preceded or accompanied by a prospectus, or summary prospectus, for the portfolio being offered. Consider the fund's investment objectives, risks, charges and expenses. Contact MFS or view online. Read it carefully.